Improvement in stock-grinders for paper-pulp



J.1=.LABRoUssE.

2 Sheets-Sheet 1.

STOCK-GRI-NDERS FOR PAPERPULP.

No.171.'8 Q

Patented Jan. 4,1876.

N-PETERS, PHOTO-LITHOGRAPHER, WASHXNGTON, [1CV 2 She'ets-Sheetz.

J'. P. LABROUSSE. sTocK-GmNn-Ens Fon PAPER-PULP. No. 171,822.

6. 7 8 1 4. L a Tb d e .Tv n nv D a D..

' following is a specification:

vIJLvrrnn STATES jPATENT OFFICE.

J EAN PROSFER LABROUSSE, OF SAINT JUNIEN, HAUTE '.VIENNE, FBJANGE.

IMPROVEMENT IN STOCK-GRINDERS FOR PAPER-PULP.

Specification lforming part of Letters Patent No. 1&7 [.822, dated January 4, 1876;

November; 30, 1874.

To all whom itmag/ concern:

Be it known that I, JEAN PRosPnR LA- BRoUssE, of Saint Junien, Haute Vienne, France, have invented certain Improvements in Paper-Pulp-Making Machines, of which the .This invention relates to the reduction of various matters suitable for conversion into paperpulp--such, for instance, as straw, wood, rags, and so on-the machinery for effecting this being so arranged that, by the simple change of the position of thevt'ools, 1t can re- 'its blades, and two views, Figs. 5 and 6, of al duce any-one of the substances above enumerated.

The apparatus consists of a `hollow cylinder, A, in two parts, united by bolts,--and supported by the two uprights'of the frame B B'. This-'cylinder is supplied internally with two pieces, C and O', inpform'ffof a comb'placed and Working with gentle friction in the chambers or rectangular parts bearing the cylinder A. (See Figs. 1 and 4.). The letters C C' represent two metallic bars setting in Ilongitudinal recessesy on opposite sides of the cylinder` A, their inner edges being provided with a series of comb-teeth. Said metallic bars are provided with adjusting-screws D D', each provided with the wheels F F' at the outward ends, which gear intoand are operated by the worm-gearing on the shaft H, each of said shafts being provided with a hand-wheel, J, for operating the same. By means of said screws and gearing the metallic combs C may be adjusted toward or'away from central shaft L, which is provided with screw-blades, as hereinafter described. The cylinder A is closedat one end by the cap K having au opening of the same diameter as the shaft L. This cap is bolted with the cylinder, and bears a bracket, M. At the other end of the cylinder a cap, K', is lixed, but this latter has a circular opening' (m'de Fig. 4) a little smaller than the inside ofthe cylinder, and it likewise bears a bracket, M'. In these two brackets a shaft, L, is placed, on whichy is fixed a cog-wheel, N, which gears with the pinion o fixed on the shaft P. 0n this same shaft P two pulleys, Q Q', are placed, one loose, and

the other xed for receiving the movement,

which is consequently transmitted to the shaft application led shoulder, a circular plate, R, ofthe same diam-I ;eter as the interior of the cylinder, but cap. able of turning freely, and having a slight space between the cap K and itself 5 second, a fseries of blades; third, a screw, S, the whole being firmly connected by the nut T, so as to iforln one piece only with the shaft L.

, In order to show more clearly the form and 2disposition of the blades on the shaft, as well as that of the v-teeth of the pieces C G', two views are shown, on a larger scale, (tide Figs. 7 and 8,) of-a part of the shaft L, armed with f part of one of the pieces C C'.

As shown by Fig. 8, a transverse section of the conical part of one Qf the blades is illustrated, showing thatthe conical part is formed of two conical surfaces, and, moreover, that i the'twoedges are-clljamfered otf so that this side presents only one rounded edge, which is 'no longer in the axis of the blade, since one of the chamfers is greater than the other. The same is the case with the teeth of the vpieces C C', Fig. 6. A transverse section of one of the teeth shows that the cone of the teeth is formed of two conical surfaces, and that the edges of one or two other sides are i chamfered off, but one more so than the other, so that this side only presents one rounded v edge, and which is no longer in the axis of the teeth. It should be mentioned that these teeth,fwhich are of a piece with those C C', could be supported, or the pieces C U' formed I of several pieces, or as .many as each yhave of teeth, provided that they are solidly united so as onlyto form the two parts C U'.

The direction of the rotary movement of the shaft L from left to right is shown by the arrow V. The rst blade on the shaft L is placed against the plate R, Fig. 4, in a position in relation with the direction of motion, in the same position as shown, Fig. 8, and placed in relation to the vertical line a b, and in accordance with the lnovement shown by the arrow V'. The second blade is placed against the .tirst one-eighth of a turn in rear turn in rear ofthe second, 'and so on. Against the last one the two-winged screw S is placed. This is of the same thread as the screws L, and on which also is fixed, first, against its formed by the blades 5 for if a line is passed of the first, the third is placed one-eighth of a.

from the points c d. ef, Fig. 8, this line will'be a screw-line of a left thread, having for its di'n'iensions eight times the thickness of a blade. Aga-in, it' another line is passed by the points c' d cf, another screw isformed-tha't 'is to say, that the shaft L, thus armed with its blades, (see Fig. 7,) represents a double-thread screw or a left thread, a section of which at its axis would have for its figure the same as that of the blades seen in Fig. 8, and on which screw the threads-,would be cut by a series of circular and conical notches, as shown, Fig. 7.

Figs. 3 and 4 show that the pieces C C and the shaft L, armed with its blades, are so placed that the blades of the shaft in turning pass in the spaces existing between the teeth or blades ofthe pieces C C', and that the teeth of the `pieces C C' pass between the spaces or conical notches existing between the blades or teeth ofthe shaft L. lf. by means ofthe flywheels J J', the pieces U C are approached toward' the `shaft L, their teeth will touch the teeth of the shaft by their conical surfaces, and produce friction.

It should be `remarked in Fig. 4 that the rst teeth of the pieces C U', which are in front of the opening or funnel V, are much shorter than the others; consequently those also of the shaft L, which face them. It is in order that the matter that is to be crushed, andwhich is inserted in this opening, should not be taken in too large a quantity at a time, which prevents gorging the machine. By this it`will be observed that 1f some straw, for instance, is placed in the funnel V, and that the shaft P is set in motion, it communicates its motion to the shaft L in the direction of the arrow V. Then the blades or teeth of this shaft, which, as stated, only present a rounded edge, take the straw by their bent or concave side and engage it between the teeth of the piece G, so presenting it also to the side which 'only offers rounded edges, and the chamt'ers of all its teeth admit of the straw engaging between the teeth ofthe shaft and those of the piece C. The straw having already received a'first crushing betw'een these teeth, is again presented below to the teeth of thep'iece O,which are in the saine `condition as the first,A and so on, in succession, the blades continue to take fresh straw and pass it between all these teeth; and it will be un? derstood also that, :by the disposition ofthe blades in form of a screw, and being more chainferedfon the side wherethe paste should be pushed than the other, the straw orpaste passes'from one blade to another in following the screw formed by the blades of the shaft L, and reaches the screw S, which lnishesby taking it as it leaves the cylinder. Moreover, the straw, which is onlypaste or paper-pulp, on leaving the cylinder, `has been entirely crushed and torn between the teeth of the pieces C C and of the shaft L without being `cut or reduced to powder, as `no cutting-edge is presented toit while in motion-that is to say, the paste or pulp is formed of fibers more or less long, but infinitely fine, Vwhich give solidity to the paper, and improve its quality. The saine is the` case with rags or other matter employed to make paper, according as it is desired that the pastelshould be more or less finely reduced. So the :pieces U and C of the shaft L are drawncloser or separated, `so

that the teeth of the pieces and. those of the shaft more or less approach one another, so that there is more or lessplay between them.

In order that theteeth which first receive the substance to be crushed should not be overworked. tlie two `piecesG C can be placed' so that when the teeth at the exit side of the pulp touch those ot' the shaft L, there will be morel or less play between those" at the opposite endthat is to say, those receiving `the matter to be reduced. u

Taps or cocks i" r 1' are placed on the cylinder A to `convey therequisite water for forming the paste; or, in other words, thatin leaving the cylinder they are ready for inakingrthe paper. The paste in leavingr can be directly conveyed to the'paper-machinmor in a vat, where is an agitator,and from the vat` to the papermachine.` i

I claim as my invention- The combination of the hollow cylinder A, adjustable, serrated, or` dentated bars C G, and the shaft L mounted with screw-blades, the whole constructed t0 operate substantially as describe-rl.

' JEAN .PROSPER LBROUSSEJ- Witnesses:

`E. HBR,

AL. HENDERSON. 

